Draining batteries?

[Rarebird]

Long and short of it I need to try to retrain three LG HG2's. The support tech said to drain the batteries as much as I can. My devices cut off (for the most part) when the batteries are supposedly low. I thought, if I had a small motor, like the ones that used to come with erector sets, I could attach the battery to it and drain it that way.

Is there a way I can completely drain my batteries? I Googled battery drainer and no products came up except for cellphone apps. I also searched these forums and no related threads I could find.

Any help would be appreciated!

 

[KenD]

Long and short of it I need to try to retrain three LG HG2's. The support tech said to drain the batteries as much as I can. My devices cut off (for the most part) when the batteries are supposedly low. I thought, if I had a small motor, like the ones that used to come with erector sets, I could attach the battery to it and drain it that way.

Is there a way I can completely drain my batteries? I Googled battery drainer and no products came up except for cellphone apps. I also searched these forums and no related threads I could find.

Any help would be appreciated!

Retrain, what do you mean by that? Li-ions don't have a memory effect so they don't need to be fully drained and then recharged to get the full capacity. In fact, not draining or charging fully will increase their life.

Sent from my M7_PLUS using Tapatalk

 

[Rarebird]

They turned out to be bad batteries after two months in storage. The guy i talked to at MFS told me I couldn't get a refund or replacement (after two months and two weeks) and suggested I retrain them. He told me to discharge them as fully as I could and then charge them to full.

Then they contacted me via my original support request and gave me store credit for three of them.

 

[Mooch]

They turned out to be bad batteries after two months in storage. The guy i talked to at MFS told me I couldn't get a refund or replacement (after two months and two weeks) and suggested I retrain them. He told me to discharge them as fully as I could and then charge them to full.

Then they contacted me via my original support request and gave me store credit for three of them.

I'm glad you got store credit!

Retrain? No such thing for li-ion batteries.

 

[Joergl100]

If You discharge them completely...they are dead! The HG2 have a discharging limit of 2.5 Volts...lower is bad for them. That "support tech" must be a hairstyler or somewhat...but definitely no technician!

 

[mcclintock]

If they were REALLY dead you wouldn't need to do anything to discharge them, they'd be already there. So I'm a little confused by this.

 

[Rarebird]

Well, with two of them, when the device shows they are at 75% charge, the device says "check battery" and cuts off. With the voltage tester, at that point they measure at 3.72 volts.

I've checked my devices with other batteries and they work fine.

 

[SupplyDaddy]

Be glad you got store credit and use it. Otherwise, I would look at your device as the problem.

 

[Rarebird]

Thank you all for your help! I'll give up on retraining them.

 

[DaveP]

Thank you all for your help! I'll give up on retraining them.

I have AW batteries that have been stored charged and idle for more than a year in a plastic box that were still above 4v and worked fine in a mod without charging. When you purposely store lithium batteries it's best to discharge them to about half charge. Mine just got ignored for a long time, but retained charge.

Sounds like those batteries have lost their current capacity. When you measure them out of the circuit you get 3.7v. In the circuit under load they must be dropping to the cutoff point of the mod and informing you to charge or replace them.

It's a losing proposition, IMO. Drop them off at the local Batteries + Bulbs store for recycling and replace them. I like www.RTDVapor.com for 18650's. You can't beat the price and they are guaranteed to be as advertised.